The Apple 20-Inch Cinema Display, released in conjunction with the "Firewire 800" line of Power Macintosh G4 models, features a 20-inch wide-format (1680x1050) active-matrix LCD display and an integrated two-port USB hub in a "crystal clear" enclosure.
This model uses an ADC (Apple Display Connector), which carries analog and digital video signals, USB data, and power in the same cable.
https://everymac.com/monitors/apple/studio_cinema/specs/apple_cinema_display_20.html